The United States Post Office no longer offers Delivery Confirmation (DCs), but they do offer USPS Tracking, which is essentially the same thing. It's actually easier, because there are no forms to fill out. When you take your package to the desk, just ask for tracking, and they will include it in your postage for a 90 cent charge. The receipt they give you will include a number that is easily tracked on the USPS website.

So from now on, USPS Tracking will be required on all swap packages mailed within the US. Remember, this is for your protection in case your package goes missing, and is a requirement!